winform程序调用条码打印机

条码打印机维修常见问题及解决方法之一：C#.net语言写的调用条码打印机的程序，仅供参考。

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace Barcode_Print
{
class LPTControl
{
[StructLayout(LayoutKind.Sequential)]
private struct OVERLAPPED
{
int Internal;
int InternalHigh;
int Offset;
int OffSetHigh;
int hEvent;
}

[DllImport("kernel32.dll")]
private static extern int CreateFile(
string lpFileName,
uint dwDesiredAccess,
int dwShareMode,
int lpSecurityAttributes,
int dwCreationDisposition,
int dwFlagsAndAttributes,
int hTemplateFile
);

[DllImport("kernel32.dll")]
private static extern bool WriteFile(
int hFile,
byte[] lpBuffer,
int nNumberOfBytesToWrite,
out int lpNumberOfBytesWritten,
out OVERLAPPED lpOverlapped
);

[DllImport("kernel32.dll")]
private static extern bool CloseHandle(
int hObject
);

private int iHandle;
public bool Open()
{
iHandle = CreateFile("lpt1", 0x40000000, 0, 0, 3, 0, 0);
if (iHandle != -1)
{
return true;
}
else
{
return false;
}

}

public bool Write(String Mystring)
{

if (iHandle != -1)
{
int i;
OVERLAPPED x;
byte[] mybyte = System.Text.Encoding.Default.GetBytes(Mystring);
return WriteFile(iHandle, mybyte, mybyte.Length, out i, out x);
}
else
{
throw new Exception("端口未打开!");
}
}

public bool Close()
{
return CloseHandle(iHandle);
}

}  
说明：环境是110Xiii,600点的机器，你需要通过lpt1口跟打印机通讯；需要答应的时候调用其中的open()方法。如需要了解更多条码打印机的常见问题请留意本站！

如有其它条码机问题可以咨询我们的条码机维修技术员！他们将为你解答！

发布日期：2010-6-18　【返回】